CN111770805B - Cutting insert having spaced apart upwardly convex lands and non-rotating cutting tool provided with the same - Google Patents
Cutting insert having spaced apart upwardly convex lands and non-rotating cutting tool provided with the same Download PDFInfo
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- CN111770805B CN111770805B CN201980015556.9A CN201980015556A CN111770805B CN 111770805 B CN111770805 B CN 111770805B CN 201980015556 A CN201980015556 A CN 201980015556A CN 111770805 B CN111770805 B CN 111770805B
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- cutting
- protrusion
- margin
- cutting edge
- cutting portion
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- 238000005555 metalworking Methods 0.000 description 2
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- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013213 extrapolation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
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- 238000003801 milling Methods 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- RYYVLZVUVIJVGH-UHFFFAOYSA-N trimethylxanthine Natural products CN1C(=O)N(C)C(=O)C2=C1N=CN2C RYYVLZVUVIJVGH-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/04—Cutting-off tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
- B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
- B23B27/1603—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with specially shaped plate-like exchangeable cutting inserts, e.g. chip-breaking groove
- B23B27/1611—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with specially shaped plate-like exchangeable cutting inserts, e.g. chip-breaking groove characterised by having a special shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/04—Cutting-off tools
- B23B27/045—Cutting-off tools with chip-breaking arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
- B23B29/04—Tool holders for a single cutting tool
- B23B29/043—Tool holders for a single cutting tool with cutting-off, grooving or profile cutting tools, i.e. blade- or disc-like main cutting parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2200/00—Details of cutting inserts
- B23B2200/04—Overall shape
- B23B2200/0471—Square
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2200/00—Details of cutting inserts
- B23B2200/08—Rake or top surfaces
- B23B2200/081—Rake or top surfaces with projections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2200/00—Details of cutting inserts
- B23B2200/28—Angles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2200/00—Details of cutting inserts
- B23B2200/32—Chip breaking or chip evacuation
- B23B2200/321—Chip breaking or chip evacuation by chip breaking projections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Milling Processes (AREA)
- Knives (AREA)
- Road Repair (AREA)
- Joining Of Corner Units Of Frames Or Wings (AREA)
Abstract
A cutting insert (20) has a cutting portion (38) formed at an intersecting corner of a rake surface (42), a cutting portion rake surface (40), and a relief surface (44). The cutting edge (52) is formed at the intersection of the rake face (42) and the relief face (44) with a margin (66) located on the rake face (42) and extending along and negatively away from the cutting edge (52). The chip control arrangement (72) is located at the rake face (42) and includes an elongate protrusion (74) and a plurality of spaced apart elongate ridges (84) extending from the protrusion (74) to the cutting edge (52) such that the margin (66) has a plurality of spaced apart convex margin portions (86). A non-rotating cutting tool (96) has an insert holder (36) including an insert pocket (34) and a cutting insert (20) releasably retained therein.
Description
Technical Field
The subject matter of the present application relates to a chip control arrangement for a cutting insert. Such an arrangement may be formed on a cutting insert configured for turning operations, among other things.
Background
The cutting insert may be provided with a chip control arrangement for controlling the flow and/or shape and size of chips and fragments produced by a metal working operation.
Such chip-control arrangements typically include recesses and/or protrusions disposed adjacent the cutting edge of the insert. The swarf may be formed into a specific shape upon striking the recess and/or the projection, from where it may then be discharged.
Various chip control arrangements for grooving operations are disclosed in US7,665,933, US9,168,588, US9,579,727 and EP 0781181.
Disclosure of Invention
According to a first aspect of the subject matter of the present application, there is provided a cutting insert comprising:
a cutting portion having a cutting portion major axis defining opposite forward and rearward directions and a cutting portion transverse axis oriented perpendicular to the cutting portion major axis in a top view of the cutting portion and defining a feed direction, the cutting portion comprising:
a cutting portion corner formed at an intersection of a rake surface facing upward, a cutting portion front surface facing forward, and a flank surface facing in a feed direction;
a cutting edge formed at the intersection of the rake surface and the relief surface;
a margin on the rake surface extending along the cutting edge and negatively away from the cutting edge; and
a chip control arrangement at a rake face, comprising:
an elongated projection projecting from the rake face, spaced from the margin, and extending in a direction from the rear toward the front of the cutting portion; and
a plurality of elongated ridges protruding from the rake face and spaced apart from each other and from the cutting portion front surface, each ridge extending from the protrusion to the cutting edge such that the margin comprises a plurality of spaced-apart, upwardly convex margin portions.
According to a second aspect of the subject matter of the present application, there is provided a non-rotary cutting tool comprising:
the cutting insert described above; and
a blade support comprising a blade slot,
wherein the cutting insert is releasably retained in the insert pocket.
It should be understood that the foregoing is an overview, and that the features described below may be applied to the subject matter of the present application in any combination, e.g., any of the following features may be applied to the cutting insert and/or cutting tool:
each pair of adjacent convex land portions may be spaced apart by a non-convex land portion. At each convex land portion, the land bevel at the cutting edge forms a convex land bevel. At each non-convex land portion, the land bevel at the cutting edge forms a non-convex land bevel. The convex margin angle at any given convex margin portion may be greater than the non-convex margin angle at an adjacent non-convex margin portion.
The convex margin angle at any given convex margin portion is no more than 5 ° greater than the non-convex margin angle at an adjacent non-convex margin portion.
The convex margin angle of inclination may take the form of a value that increases in a direction away from the cutting portion front surface.
The convex margin angle of inclination may be greater than or equal to 20 ° and less than or equal to 40 °.
The non-convex land bevel angle can be greater than or equal to 5 ° and less than or equal to 30 °.
The plurality of ridges may be different.
In an infeed plane perpendicular to the cutting portion transverse axis and intersecting the plurality of ridges, the plurality of ridges may take the form of increasing heights in the rearward direction away from the cutting portion front surface.
The projection may be spaced from the margin by a chip-forming flute that undulates in a rearward direction away from the cutting portion front surface.
The distance of the protrusion from the cutting edge may increase as the distance from the front surface of the cutting portion increases.
The foremost portion of the protrusion may extend in a direction towards the corner of the cutting portion.
The rearmost portion of the protrusion may extend longitudinally along the protrusion longitudinal axis. In a top view of the cutting portion, the protrusion longitudinal axis forms a protrusion angle with the cutting portion main axis. The protrusion angle may be greater than or equal to 5 ° and less than or equal to 15 °.
The protrusion may include two protrusion side surfaces and a protrusion ridge surface provided in the center extending therebetween in the width direction of the protrusion, the protrusion ridge surface being higher than the two protrusion side surfaces in a cross section in the width direction.
In a top view of the cutting portion, the protrusion ridge surface may be located between the cutting portion main axis and the cutting edge.
In a top view of the cutting portion, the protrusion ridge surface transitions from being closer to the cutting edge than to the main axis of the cutting portion to being closer to the main axis of the cutting portion than to the cutting edge as the protrusion ridge surface extends in the rearward direction.
The protrusion ridge surface may include a plurality of protrusion crest portions and at least one protrusion trough portion, each pair of adjacent protrusion crest portions being spaced apart by a respective protrusion trough portion, and each protrusion crest portion being higher than an adjacent protrusion trough portion. Each protuberance may extend from a respective one of the protuberance peak portions.
The plurality of protrusion peak portions may take the form of increasing heights in the rearward direction away from the cutting portion front surface.
The plurality of protrusion peak portions may be located above the cutting edge as measured in an upward direction.
Each ridge may extend along a ridge longitudinal axis. In a top view of the cutting portion, each ridge longitudinal axis forms a ridge angle with the cutting portion transverse axis. The bulge angle may be greater than or equal to 0 ° and less than or equal to 30 °.
In a top view of the cutting portion, the ridge longitudinal axes may be parallel to each other.
In a cross-sectional view taken in a bulge axial plane containing one bulge longitudinal axis and intersecting the rake and relief surfaces, a central portion of the bulge may have a concave profile.
In a cross-sectional view taken in a radial plane of the ridge perpendicular to one longitudinal axis of the ridge and intersecting the ridge, the central portion of the ridge may have a convex profile.
In a top view of the cutting portion, the cutting edge may be straight.
In a side view of the cutting portion, the cutting edge may be non-straight.
In a side view of the cutting portion, the cutting edge may have a wavy profile formed by a plurality of cutting edge peaks and at least one cutting edge trough, each cutting edge peak being formed at a respective one of the convex land portions.
The margin may comprise a convexly curved margin portion extending in the direction of the cutting edge and convexly curved in a direction away from the cutting edge.
The convexly curved land portion may be spaced apart from the cutting edge.
The convexly curved margin portion may be defined by a convexly curved margin radius that varies along the cutting edge.
The cutting portion transverse axis may define a second feed direction opposite the feed direction, and the cutting portion may further comprise:
a second cutting portion corner formed at an intersection of the rake surface, the cutting portion front surface, and a second flank surface facing a second feed direction;
a second cutting edge formed at an intersection of the rake surface and the second relief surface;
a second margin on the rake surface extending along the second cutting edge and negatively away from the second cutting edge,
wherein the chip control arrangement may further comprise:
an elongated second projection projecting from the rake face, spaced apart from the second margin and extending in a direction toward the front of the cutting portion; and
a plurality of elongated second ridges protruding from the rake face and spaced apart from each other and from the cutting portion front surface, each second ridge extending from the second protrusion to the second cutting edge such that the second margin comprises a plurality of spaced apart second convex margin portions.
The cutting portion may further comprise a forward cutting edge formed at the intersection of the rake surface and the forward surface of the cutting portion, wherein the forward cutting edge has a forward cutting edge length in a top view of the cutting portion, the forward cutting edge length further defining a maximum width dimension of the cutting insert in a direction perpendicular to the major axis of the cutting portion.
The chip control arrangement may have a mirror symmetry with respect to a symmetry plane containing a cutting portion main axis and a cutting portion vertical axis, which is perpendicular to the cutting portion main axis and extends between the relief surface and the second relief surface.
Drawings
For a better understanding of the present application and to show how the same may be carried into effect, reference will now be made to the accompanying drawings, in which:
fig. 1 is a perspective view of a cutting insert according to a first embodiment of the present application;
FIG. 2 is a detail of FIG. 1 showing a cutting portion;
FIG. 3 is a side view of the cutting portion of FIG. 2;
FIG. 3a is a detail of FIG. 3;
FIG. 4 is a front view of the cutting portion of FIG. 2;
FIG. 5 is a partial perspective view of the cutting portion of FIG. 1 showing the wavy chip-forming flute and an imaginary extrapolated land surface;
FIG. 6a is a top view of the cutting portion of FIG. 2;
FIG. 6b is a view similar to that shown in FIG. 6a, for indicating a cut line;
FIG. 7 is a schematic diagram showing a superimposed partial section taken along lines VII-VII and VII '-VII' of FIG. 6 b;
FIG. 8 is a partial cross-sectional view taken along line VIII-VIII of FIG. 6 b;
FIG. 9 is a partial cross-sectional view taken along line IX-IX of FIG. 6 b;
FIG. 10 is a partial cross-sectional view taken along line X-X of FIG. 6 b;
FIG. 11 is a partial cross-sectional view taken along line XI-XI of FIG. 6 b;
fig. 12 is a top view of a cutting portion according to a second embodiment of the present application; and is also provided with
Fig. 13 is a perspective view of a cutting tool according to the present application.
Where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements.
Detailed Description
In the following description, various aspects of the subject matter of the present application will be described. For purposes of explanation, specific configurations and details are set forth in sufficient detail to provide a thorough understanding of the subject matter of the present application. However, it will be apparent to one skilled in the art that the subject matter of the present application may be practiced without the specific configurations and details presented herein.
Attention is first drawn to fig. 1, which shows a cutting insert 20 according to a first embodiment of the present application. The cutting insert 20 may typically be made of cemented carbide and may be coated with a wear resistant material. In this non-limiting example shown in the drawings, the cutting insert 20 includes opposed insert front and rear surfaces 22, 24 and an insert peripheral surface 26 extending between the insert front and rear surfaces 22, 24. The insert peripheral surface 26 extends about an insert central axis I. The insert central axis I may be a longitudinal axis such that the cutting insert 20 is elongated. The insert central axis I intersects the insert front surface 22 and the insert rear surface 24. The insert peripheral surface 26 includes opposing insert top and bottom surfaces 28, 30 connecting the insert front and rear surfaces 22, 24. The insert peripheral surface 26 also includes two opposing insert side surfaces, namely a first insert side surface 32A and a second insert side surface 32B, connecting the insert front surface 22 and the insert rear surface 24 and the insert top surface 28 and the insert bottom surface 30. It should also be noted that in this non-limiting example, the cutting insert 20 is configured to be resiliently clamped in the insert pocket 34 of the insert holder 36 (fig. 13), and is thus formed without a clamping hole for receiving a clamping member (e.g., a set screw) therethrough.
Referring to fig. 2, the cutting insert 20 includes a cutting portion 38 for providing metal removal capability to the cutting insert 20. In this non-limiting example shown in the drawings, the cutting insert 20 has only one cutting portion 38 at one end of the cutting insert 20. However, it should be understood that there may be two cutting portions 38 (e.g., at each end when the cutting insert 20 is double ended) or more cutting portions 38, such as disclosed in US8,939,684B2.
Referring to fig. 2, 3, 4 and 6a, the cutting portion 38 has three mutually perpendicular stripsAxes, namely a cutting portion major axis a, a cutting portion vertical axis V, and a cutting portion lateral axis F. The cutting portion major axis A defines a forward direction D F And a backward direction D R . According to some embodiments of the subject matter of the present application, the cutting portion major axis a may be parallel and aligned with the insert central axis I in a top view of the cutting portion 38 as viewed along the cutting portion vertical axis V. However, as shown in a side view of the cutting portion 38 as viewed along the cutting portion transverse axis F (i.e., fig. 3), the cutting portion major axis a and the insert central axis I may extend transverse to one another. The cutting portion vertical axis V defines an upward direction D U And downward direction D D . The cutting portion transverse axis F defines at least a feed direction D. According to some embodiments of the subject matter of the present application, the cutting portion transverse axis F may also define a second feed direction D opposite to the feed direction D 2 . The cutting portion 38 has a symmetry plane S that includes a cutting portion major axis a and a cutting portion vertical axis V.
It should be understood that throughout the specification and claims, the use of the words "forward" and "rearward" refer to the direction of the major axis a of the cutting portion in fig. 3 and 6a, respectively, to the left (D F ) And to the right (D) R ) Is used for the relative position of the two parts. Also, it should be understood that the use of the words "upward" and "downward" throughout the specification and claims refer to relative positions that are upwardly and downwardly, respectively, in fig. 3 and 4 in a direction parallel to the cutting portion vertical axis V. Finally, it should be understood that the use of the words "feed direction" and "second feed direction" throughout the specification and claims refers to relative positions that are respectively left and right in a direction parallel to the cutting portion transverse axis F in fig. 4.
The cutting portion 38 includes a cutting portion front surface 40 formed on the insert front surface 22. The cutting portion front surface 40 intersects the cutting portion main axis a and faces in a forward direction D F 。
The cutting portion 38 includes a rake surface 42 formed on the insert top surface 28. The rake surface 42 intersects the cutting portion vertical axis V and faces in an upward direction D U 。
The cutting portion 38 also includes a first bladeA relief surface 44 on the side surface 32A. The flank surface 44 intersects the cutting portion transverse axis F and faces the feed direction D. According to some embodiments of the subject matter of the present application, the cutting portion 38 may include a second relief surface 48 formed on the second side surface 32B. The second relief surface 48 may intersect the cutting portion transverse axis F and face in a second feed direction D 2 . A cutting portion vertical axis V extends between the relief surface 44 and the second relief surface 48. Thus, the symmetry plane S is located between the relief surface 44 and the second relief surface 48.
A cutting corner 46 is formed at the intersection of the rake face 42, the cutting front surface 40, and the relief face 44. According to some embodiments of the subject matter of the present application, a second cutter corner 50 may be formed at the intersection of the rake surface 42, the cutter front surface 40, and the second relief surface 48.
The cutting portion 38 includes a cutting edge 52 formed at the intersection of the rake surface 42 and the relief surface 44. Referring to fig. 6a, in a top view of the cutting portion 38, the cutting edge 52 may be straight, according to some embodiments of the subject matter of the present application. Referring to fig. 3a, in a side view of the cutting portion 38, the cutting edge 52 may be non-straight. Preferably, in such a view, the cutting edge 52 may have a wavy profile formed by a plurality of cutting edge peaks 54 and at least one cutting edge valleys 56 alternating with one another along the cutting edge 52.
Referring to fig. 6a, in accordance with some embodiments of the subject matter of the present application, the cutting portion 38 may further include a second cutting edge 58 formed at the intersection of the rake surface 42 and the second relief surface 48. In a top view of the cutting portion 38, the second cutting edge 58 may be straight, but not parallel to the cutting edge 52.
According to some embodiments of the subject matter of the present application, the cutting portion 38 may include a forward cutting edge 60 formed at the intersection of the rake surface 42 and the cutting portion forward surface 40. Thus, the front cutting edge 60 may function as a relief surface. As shown in fig. 4 and 6a, the front cutting edge 60 has a front cutting edge length L measured in the direction of the cutting portion transverse axis F. The front cutting edge length L defines the width of the groove cut in the workpiece in a top view of the cutting portion 38, and also determines the maximum width of the cutting portion 38. According to some embodiments of the subject matter of the present application, the front cutting edge 60 may include two curved front corner cutting edges 62 and a front intermediate cutting edge 64 extending between the two front corner cutting edges 62. The leading corner cutting edge 62 may be formed at the cutting corner 46 and the second cutting corner 50, respectively. The front intermediate cutting edge 64 may be longer than each of the two front corner cutting edges 62. The front intermediate cutting edge 64 may be straight in a top view of the cutting portion 38. The forward cutting edge 60 may be mirror-symmetrical with respect to an imaginary longitudinal plane containing the cutting portion major axis a and passing through the insert top surface 28 and the insert bottom surface 30. Thus, in a top view of the cutting portion 38 (i.e., in a view forward of the rake face 42 as viewed along the cutting portion vertical axis V), the cutting portion major axis a may bisect the leading cutting edge 60. The cutting edge 52 and the second cutting edge 58 may merge with the forward cutting edge 60 at opposite ends thereof.
The rake face 42 includes a margin 66. The margin 66 serves to strengthen the cutting edge 52. The land 66 abuts the cutting edge 52. The margin 66 extends along the cutting edge 52. Referring to fig. 5, any point on margin 66 has a margin angle θ defined by a tangent line T that is perpendicular to cutting edge 52 in a top view of cutting portion 38 and in tangential contact with margin 66 and a rake plane P oriented perpendicular to cutting portion vertical axis V. The margin 66 extends negatively away from the cutting edge 52. That is, the margin 66 is inclined upwardly from the cutting edge 52 such that the margin angle θ is greater than 0 °.
In accordance with some embodiments of the subject matter of the present application, the rake face 42 can include a rake land 69. The forward margin 69 can abut the forward cutting edge 60. The forward margin 69 can extend along and negatively away from the forward cutting edge 60. Referring to fig. 6a, the front margin 69 has a variable front margin width W. Preferably, the front margin width W at the front intermediate cutting edge 64 may be greater than the front margin width W at the front corner cutting edge 62.
In accordance with some embodiments of the subject matter of the present application, the rake face 42 can include a second margin 70. The second margin 70 can abut the second cutting edge 58. The second margin 70 can extend along and negatively away from the second cutting edge 58.
The cutting portion 38 includes a chip control arrangement 72 at the rake surface 42. It should be appreciated that a cutting insert 20 according to the subject matter of the present application may include one or more cutting portions 38 having such chip-control arrangements 72, as well as one or more other cutting portions 38 without any chip-control arrangements or formed with different chip-control arrangements. The chip control arrangement 72 is used to control the flow and/or shape and size of chips and fragments produced by a metal working operation.
Referring to fig. 1-6 a, the chip control arrangement 72 includes an elongated protrusion 74. The projection 74 serves to bend the chip in the feed direction D. The protrusion 74 protrudes from the rake face 42. The tab 74 is spaced from the margin 66. As shown in fig. 5, according to some embodiments of the subject matter of the present application, the tab 74 may be spaced from the margin 66 by a chip-forming flute 78, the chip-forming flute 78 being spaced away from the cutting portion front surface 40 in a rearward direction D R Is wavy in shape (see also fig. 7).
The protruding portion 74 extends in a direction from the rear portion of the cutting portion 38 toward the front portion of the cutting portion 38. According to some embodiments of the subject matter of the present application, the tab 74 may include a forward-most portion 76a and a rearward-most portion 76b that merge with each other. The rearmost portion 76b of the protrusion 74 may form a majority of the length of the protrusion 74 (e.g., greater than half the length of the protrusion 74).
The forward-most portion 76a of the tab 74 may extend in a direction toward the cutter corner 46. The rearmost portion 76b of the protrusion 74 may extend in a different direction than the frontmost portion 76a of the protrusion 74. The rearmost portion 76b of the protrusion 74 may extend in a direction toward the cutting portion front surface 40. The distance of the protrusion 74 from the cutting edge 52 may increase as the distance from the cutting portion front surface 40 increases. The rearmost portion 76b of the tab 74 may extend longitudinally along the tab longitudinal axis C. In a top view of the cutting portion 38, the protrusion longitudinal axis C may form a protrusion angle α with the cutting portion main axis a. The protrusion angle alpha may be in the range of 5 deg. to 15 deg.. The tab longitudinal axis C may intersect the front cutting edge 60. Preferably, the tab longitudinal axis C may intersect the front intermediate cutting edge 64.
As shown in fig. 10 and 11, the tab 74 may include two according to some embodiments of the subject matter of the present applicationA protrusion side surface 74a and a central protrusion ridge surface 74b extending therebetween in the width direction of the protrusion 74. The protrusion ridge surface 74b may be higher than the two protrusion side surfaces 74a in a cross section in the width direction. The central protrusion ridge surface 74b at the rearmost portion 76b of the protrusion 74 may extend along the protrusion longitudinal axis C (as shown in the top view of the cutting portion 38, i.e., fig. 6 a). In the same view, with the protrusion ridge surface 74b in the rearward direction D R Extending upwardly, the tab ridge surface 74b may transition from nearer to the cutting edge 52 than to the cutting edge major axis a to nearer to the cutting edge major axis a than to the cutting edge 52.
Referring to fig. 8, which shows a cross-sectional view taken in a plane containing the protrusion longitudinal axis C, according to some embodiments of the subject matter of the present application, the protrusion ridge surface 74b may include a plurality of protrusion peak portions 80 and at least one protrusion valley portion 82, with each pair of adjacent protrusion peak portions 80 being separated by a respective protrusion valley portion 82. Each of the projection peak portions 80 is higher than its adjacent projection trough portion 82.
According to some embodiments of the subject matter of the present application, when in the upward direction D U The plurality of tab peak portions 80 may be located above the cutting edge 52 as measured above. The plurality of protrusion peak portions 80 may take the form of a height away from the cutting portion front surface 40 in the rearward direction D R In an increased form. When in the upward direction D U At least one of the raised valley portions 82 may be located above the cutting edge 52 as measured above.
Referring to fig. 1-6 a, the chip control arrangement 72 includes a plurality of elongated ridges 84. The plurality of ridges 84 serve to bend the chip in the direction of the cutting portion main axis a. A plurality of ridges 84 protrude from the rake surface 42. The plurality of ridges 84 are spaced apart from one another and from the cutting portion front surface 40. According to some embodiments of the subject matter of the present application, each protuberance 84 may extend from a respective one of the protuberance crest portions 80. The plurality of ridges 84 may be different. Referring to fig. 9, a cross-sectional view in the infeed plane FP perpendicular to the cutting portion transverse axis F and intersecting the plurality of ridges 84 is shown (note, at cuttingThe first raised area behind the blade 60 is part of the tab 74, specifically its forward-most portion 76a, rather than one of the ridges 84). It can be seen that the plurality of ridges 84 may take on a height away from the cutting portion front surface 40 in the rearward direction D R In an increased form.
As shown in fig. 9, which shows a cross-sectional view taken in a bulge radial plane P2 perpendicular to one bulge longitudinal axis PA and intersecting bulge 84, each bulge 84 may include two bulge side surfaces 84a and a central bulge ridge surface 84b extending therebetween in the width direction of bulge 84, according to some embodiments of the subject matter of the present application. The ridge surface 84b may be higher than the two ridge side surfaces 84a in the cross section in the width direction.
Fig. 10 shows a cross-sectional view taken in a bulge axial plane P1 containing one bulge longitudinal axis PA and intersecting the rake face 42 and the relief face 44. According to some embodiments of the subject matter of the present application, each protuberance 84 may include a protuberance nadir LP. Ridge nadir LP may be spaced from margin 66. The ridge lowest point LP may be vertically flush with the cutting edge 52.
According to some embodiments of the subject matter of the present application, each protuberance 84 may extend along a protuberance longitudinal axis PA. In a top view of the cutting portion 38, the ridge longitudinal axes PA may be parallel to each other. The bump longitudinal axis PA may not coincide with the respective tangent T. Each ridge longitudinal axis PA may form a ridge angle β with the cutting portion transverse axis F. The bulge angle beta may be in the range of 0 deg. beta.30 deg.. In this non-limiting example shown in the drawings, the bulge angle β is equal to 0 ° (i.e., the bulge longitudinal axis PA and the cutting portion transverse axis F are parallel to each other).
In accordance with some embodiments of the subject matter of the present application, in the bulge axial plane P1, the central portion of the bulge 84 may have a concave profile. The ridge nadir LP may be located at the concave profile. In the bulge radial plane P2, a central portion of the bulge 84 may have a convex profile.
Each of the protuberances 84 extends from the protrusion 74. Through this, theIn various configurations, the protrusion-side surface 74a closest to the cutting edge 52 may be remote from the cutting-portion front surface 40 in the rearward direction D R The upper part is wavy.
Referring to fig. 5, each of the ridges 84 extends to the cutting edge 52. That is, each of the ridges 84 terminates in a cutting edge 52. Thus, each ridge 84 extends across margin 66 (or via margin 66). With this configuration, the margin 66 includes a plurality of spaced apart upwardly convex margin portions 86. Each pair of adjacent convex margin portions 86 are separated by a non-convex margin portion 88. The margin 66 has an upward direction D U And a margin height H measured from the rake surface P that varies along the cutting edge 52. Specifically, the margin height H at each convex margin portion 86 defines a first margin height H 1 Which is greater than a second margin height H defined by the margin height H at the adjacent non-convex margin portion 88 2 . Each cutting edge peak 54 may be formed at a respective one of the convex land portions 86.
Referring to fig. 7, which shows a schematic view with overlapping partial sections taken along lines VII-VII and VII ' -VII ' in fig. 6b, and which also shows two different tangents T, T ' associated with each section, the lands 66 (at the convex land portion 86 and the non-convex land portion 88) may include a convex curved land portion 68 extending in the direction of the cutting edge 52. The convexly curved land portion 68 also curves convexly in a direction away from the cutting edge 52. Thus, the margin angle θ at the convexly curved margin portion 68 may decrease in a direction away from the cutting edge 52. The convexly curved land portion 68 may be spaced apart from the cutting edge 52. The convexly curved margin portion 68 can be defined by a convexly curved margin radius R. The convex curved margin radius R can vary along the cutting edge 56.
At each convex land portion 86, the land bevel angle θ at the cutting edge 52 forms a convex land bevel angle θ1. At each non-convex land portion 88, the land bevel θ at the cutting edge 52 forms a non-convex land bevel θ2. According to some embodiments of the subject matter of the present application, the convex margin angle θ1 at any given convex margin portion 86 may be greater than the non-convex margin angle θ2 at an adjacent non-convex margin portion 88. Thus, as shown in fig. 5, which illustrates an imaginary extrapolated margin surface 89 defined by the extrapolation of margin 66 at cutting edge 52, the margin angle θ at cutting edge 52 may vary in an alternately increasing and decreasing manner along cutting edge 52. The convex margin angle θ1 at any given convex margin portion 86 can be no more than 5 ° greater than the non-convex margin angle θ2 at the adjacent non-convex margin portion 88. The convex margin angle θ1 can be in the range of 20 to 40 ° inclusive of θ1. The non-convex margin angle θ2 can be in the range of 5 ° to θ2 to 30 °.
In general, the margin 66 transitions into the chip-forming flute 78 at the point where its extended surface changes from negative to positive orientation. It should be noted, however, that at the convex margin 86, the margin 66 may not transition to a positive orientation.
According to some embodiments of the subject matter of the present application, the chip control arrangement 72 may include an elongated second protrusion 90. The second projection 90 may project from the rake face 42. The second projection 90 may extend in a direction toward the front of the cutting portion 38. The second tab 90 can be spaced apart from the second margin 70.
According to some embodiments of the subject matter of the present application, the chip control arrangement 72 may include a plurality of elongated second ridges 92. A plurality of second ridges 92 may protrude from the rake surface 42. The plurality of second ridges 92 may be spaced apart from each other and from the cutting portion front surface 40. Each second ridge 92 may extend from the second protrusion 90 to the second cutting edge 58. Each second ridge 92 may extend to the second cutting edge 58. Each second ridge 92 can extend across the second margin 70 (i.e., via the second margin 70). Thus, as shown in fig. 2, the second margin 70 can include a plurality of spaced apart second convex margin portions 94. The chip control arrangement 72 may have a specular symmetry about a symmetry plane S. Similarly, the cutting portion 38 may have mirror symmetry about the plane of symmetry S.
It should be appreciated that any or all of the features associated with the relief surface 44, the cutting portion corner 46, the cutting edge 52, the margin 66, the protrusion 74, the protuberance 84, and the convex margin 86 may be applicable to the second relief surface 48, the second cutting portion corner 50, the second cutting edge 58, the second margin 70, the second protrusion 90, the second protuberance 92, and the second convex margin 94, respectively.
Referring to fig. 13, a second aspect of the present application relates to a non-rotating cutting tool 96. For example, the cutting tool 96 may be designed for use in turning operations other than milling or drilling operations. The cutting tool 96 includes a cutting insert 20 and an insert holder 36. The insert holder 36 comprises an insert pocket 34, wherein the cutting insert 20 is releasably retained in the insert pocket 34.
Reference is now made to fig. 13 which shows a second embodiment. This embodiment has been found to be particularly suitable for grooving cutting inserts having a width equal to 6mm (i.e., a leading cutting edge length L).
It should be noted that one feature of the subject matter of the present application is that the chip control arrangement 72 has been found to be effective for turning, particularly grooving turning methods.
It should also be noted that one feature of the subject matter of the present application is that the chip control arrangement 72 has been found to be effective for cutting different metallic workpiece materials (e.g., steel, stainless steel, and high temperature metal alloys, such as nickel).
It should also be noted that one feature of the subject matter of the present application is that the chip control arrangement 72 has been found to be effective for a variety of applications, such as full width grooving, partial (fine) grooving, finish turning, and turning.
Although the subject matter of the present application has been described to a certain degree of particularity, it should be understood that various alterations and modifications could be made without departing from the spirit or scope of the invention as hereinafter claimed.
Claims (26)
1. A cutting insert (20), comprising:
a cutting portion (38) having a cutting portion major axis (A) defining opposite forward directions (D) F ) And a backward direction (D R ) The cutting portion transverse axis being oriented perpendicular to the cutting portion main axis (a) in a top view of the cutting portion (38) and defining a feed direction (D), the cutting portion (38) comprising: a cutting portion corner (46) formed in an upward directionAn intersection of a rake surface (42), a forward facing cutting portion rake surface (40), and a flank surface (44) facing the feed direction (D);
a cutting edge (52) formed at the intersection of the rake surface (42) and the relief surface (44);
a margin (66) located on the rake face (42) and extending along the cutting edge (52) and negatively away from the cutting edge (52); and
a chip control arrangement (72) at the rake surface (42), comprising:
an elongated projection (74) projecting from the rake face (42), spaced apart from the margin (66) and extending in a direction from the rear toward the front of the cutting portion (38); and
a plurality of elongated ridges (84) protruding from the rake surface (42) and spaced apart from each other and from the cutting portion front surface (40), each ridge (84) extending from the protrusion (74) to the cutting edge (52) such that the margin (66) includes a plurality of spaced-apart, upwardly convex margin portions (86).
2. The cutting insert (20) according to claim 1, wherein:
each pair of adjacent convex margin portions (86) being separated by a non-convex margin portion (88);
at each of the convex land portions (86), a land inclination angle θ at the cutting edge (52) forms a convex land inclination angle θ1;
at each of the non-convex land portions (88), a land bevel θ at the cutting edge (52) forms a non-convex land bevel θ2;
the convex margin angle θ1 at any given convex margin portion (86) is greater than the non-convex margin angle θ2 at the non-convex margin portion (88) adjacent thereto.
3. The cutting insert (20) according to claim 2, wherein the convex margin angle θ1 at any given convex margin portion (86) is no more than 5 ° greater than the non-convex margin angle θ2 at the non-convex margin portion (88) adjacent thereto.
4. The cutting insert (20) according to claim 2, wherein:
the convex edge inclination angle theta 1 is in the range of 20 degrees or more and less than or equal to theta 1 or less than or equal to 40 degrees; and is also provided with
The non-convex margin angle theta 2 is in the range of 5 DEG to theta 2 to theta 30 deg.
5. The cutting insert (20) according to claim 2, wherein the convex margin angle θ1 takes the form of a value that increases in a direction away from the cutting portion front surface (40).
6. The cutting insert (20) according to claim 1, wherein, in a cross-sectional view taken in a infeed plane (FP) perpendicular to the cutting portion transverse axis (F) and intersecting the plurality of ridges (84), the plurality of ridges (84) assume a height away from the cutting portion front surface (40) in the rearward direction (D R ) In an enlarged form.
7. The cutting insert (20) according to claim 1, wherein the projection (74) is spaced from the margin (66) by a chip-forming flute (78) that is spaced away from the cutting portion front surface (40) in the rearward direction (D R ) The upper part is wavy.
8. The cutting insert (20) according to claim 1, wherein a distance of the protrusion (74) from the cutting edge (52) increases with increasing distance from the cutting portion front surface (40).
9. The cutting insert (20) according to claim 1, wherein a forward-most portion (76 a) of the projection (74) extends in a direction toward the cutting corner (46).
10. The cutting insert (20) according to claim 1, wherein:
a rearmost portion (76 b) of the tab (74) extends longitudinally along a tab longitudinal axis (C);
in a top view of the cutting portion (38), the protrusion longitudinal axis (C) forms a protrusion angle a with the cutting portion main axis (a); and is also provided with
The protrusion angle alpha is in the range of 5 degrees or more and 15 degrees or less.
11. The cutting insert (20) according to claim 1, wherein the protrusion (74) comprises two protrusion side surfaces (74 a) and a centrally disposed protrusion ridge surface (74 b) extending therebetween in a width direction of the protrusion (74), the protrusion ridge surface (74 b) being higher than the two protrusion side surfaces (74 a) in a cross section in the width direction.
12. The cutting insert (20) according to claim 11, wherein the protrusion ridge surface (74 b) is located between the cutting portion major axis (a) and the cutting edge (52) in a top view of the cutting portion (38).
13. The cutting insert (20) according to claim 11, wherein, in a top view of the cutting portion (38), a ridge surface (74 b) follows the protrusion in the rearward direction (D R ) Extending upwardly, the protrusion ridge surface (74 b) transitions from nearer to the cutting edge (52) than to the cutting main axis (a) to nearer to the cutting main axis (a) than to the cutting edge (52).
14. The cutting insert (20) according to claim 1, wherein:
the protrusion ridge surface (74 b) comprising a plurality of protrusion crest portions (80) and a plurality of protrusion trough portions (82), each pair of adjacent protrusion crest portions (80) being spaced apart by a respective protrusion trough portion (82), and each protrusion crest portion (80) being higher than its adjacent protrusion trough portion (82); and is also provided with
Each of the protuberances (84) extends from a respective one of the protuberance peak portions (80).
15. The cutting insert (20) according to claim 14, wherein a plurality of the protrusion peak portions (80) take the form of a plurality of the protrusion peak portions having a height in the rearward direction (D R ) In the form of an increase away from the cutting portion front surface (40).
16. The cutting insert (20) according to claim 14, wherein when in an upward direction (D U ) A plurality of the projection peak portions (80) are located above the cutting edge (52) as measured above.
17. The cutting insert (20) according to claim 1, wherein:
each of the ridges (84) extending along a ridge longitudinal axis (PA);
in a top view of the cutting portion (38), each of the ridge longitudinal axes (PA) forms a ridge angle β with the cutting portion transverse axis (F); and is also provided with
The bulge angle beta is in the range of more than or equal to 0 degree and less than or equal to 30 degrees.
18. The cutting insert (20) according to claim 17, wherein, in a top view of the cutting portion (38), the ridge longitudinal axes (PA) are parallel to each other.
19. The cutting insert (20) according to claim 17, wherein a central portion of the ridge (84) has a concave profile in a cross-sectional view taken in a ridge axial plane (P1) containing one of the ridge longitudinal axes (PA) and intersecting the rake surface (42) and the relief surface (44).
20. The cutting insert (20) according to claim 17, wherein, in a cross-sectional view taken in a ridge radial plane (P2) perpendicular to one of the ridge longitudinal axes (PA) and intersecting the ridge (84), a central portion of the ridge (84) has a convex profile.
21. The cutting insert (20) according to claim 1, wherein the cutting edge (52) has a wavy profile formed by a plurality of cutting edge peaks (54) and at least one cutting edge valleys (56) in a side view of the cutting portion (38), each cutting edge peak (54) being formed at a respective one of the convex land portions (86).
22. The cutting insert (20) according to claim 1, wherein the margin (66) comprises a convexly curved margin portion (68) extending in a direction of the cutting edge (52) and convexly curved in a direction away from the cutting edge (52).
23. The cutting insert (20) according to claim 1, wherein:
the cutting portion transverse axis (F) defines a second feed direction (D) opposite the feed direction (D) 2 ) The cutting portion (38) further includes:
a second cutting corner (50) formed in the rake surface (42), the cutting front surface (40), and toward the second feed direction (D 2 ) An intersection of the second flank (48);
a second cutting edge (58) formed at an intersection of the rake surface (42) and the second relief surface (48); a second margin (70) located on the rake surface (42) and extending along the second cutting edge (58) and negatively away from the second cutting edge (58),
wherein the chip control arrangement (72) further comprises:
an elongated second projection (90) projecting from the rake face (42), spaced apart from the second margin (70) and extending in a direction toward the front of the cutting portion (38); and
a plurality of elongated second ridges (92) protruding from the rake surface (42) and spaced apart from each other and from the cutting portion front surface (40), each of the second ridges (92) extending from the second protrusion (90) to the second cutting edge (58) such that the second margin (70) includes a plurality of spaced apart second convex margin portions (94).
24. The cutting insert (20) according to claim 23, wherein:
the cutting portion (38) further includes a forward cutting edge (60) formed at the intersection of the rake surface (42) and the cutting portion forward surface (40); and is also provided with
In a top view of the cutting portion (38), the front cutting edge (60) has a front cutting edge length (L) that also defines a maximum width dimension of the cutting insert (20) in a direction perpendicular to the cutting portion major axis (a).
25. The cutting insert (20) according to claim 23, wherein the chip-control arrangement (72) has a mirror symmetry with respect to a symmetry plane (S) containing the cutting portion main axis (a) and a cutting portion vertical axis (V) perpendicular to the cutting portion main axis (a) and extending between the relief surface (44) and the second relief surface (48).
26. A non-rotating cutting tool (96), comprising:
the cutting insert (20) according to any one of claims 1-25; and
a blade holder (36) comprising a blade slot (34),
wherein the cutting insert (20) is releasably retained in the insert pocket (34).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201862636225P | 2018-02-28 | 2018-02-28 | |
| US62/636,225 | 2018-02-28 | ||
| PCT/IL2019/050036 WO2019167037A1 (en) | 2018-02-28 | 2019-01-08 | Cutting insert having land with spaced apart upwardly bulging land portions and non-rotary cutting tool provided therewith |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111770805A CN111770805A (en) | 2020-10-13 |
| CN111770805B true CN111770805B (en) | 2023-07-28 |
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|---|---|---|---|
| CN201980015556.9A Active CN111770805B (en) | 2018-02-28 | 2019-01-08 | Cutting insert having spaced apart upwardly convex lands and non-rotating cutting tool provided with the same |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US10987740B2 (en) |
| EP (1) | EP3758874B1 (en) |
| JP (1) | JP7275149B2 (en) |
| KR (1) | KR102587432B1 (en) |
| CN (1) | CN111770805B (en) |
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| TW (1) | TWI773866B (en) |
| WO (1) | WO2019167037A1 (en) |
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|---|---|---|---|---|
| TWI773866B (en) | 2018-02-28 | 2022-08-11 | 以色列商艾斯卡公司 | Cutting insert having land with spaced apart upwardly bulging land portions and non-rotary cutting tool provided therewith |
| JP6923854B1 (en) * | 2021-02-26 | 2021-08-25 | 株式会社タンガロイ | Cutting insert |
| USD953396S1 (en) * | 2021-04-29 | 2022-05-31 | Korloy Inc. | Grooving insert for machine tools for metalworking |
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| CN106413953A (en) * | 2014-05-20 | 2017-02-15 | 伊斯卡有限公司 | Cutting insert with chip-control arrangement |
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- 2019-01-02 TW TW108100021A patent/TWI773866B/en active
- 2019-01-03 US US16/238,958 patent/US10987740B2/en active Active
- 2019-01-08 EP EP19701739.5A patent/EP3758874B1/en active Active
- 2019-01-08 CA CA3098545A patent/CA3098545A1/en active Pending
- 2019-01-08 KR KR1020207024892A patent/KR102587432B1/en active Active
- 2019-01-08 PL PL19701739.5T patent/PL3758874T3/en unknown
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- 2019-01-08 CN CN201980015556.9A patent/CN111770805B/en active Active
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- 2019-01-08 ES ES19701739T patent/ES2993353T3/en active Active
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- 2019-01-08 WO PCT/IL2019/050036 patent/WO2019167037A1/en active Application Filing
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| CN106413953A (en) * | 2014-05-20 | 2017-02-15 | 伊斯卡有限公司 | Cutting insert with chip-control arrangement |
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| JP2021514859A (en) | 2021-06-17 |
| JP7275149B2 (en) | 2023-05-17 |
| IL276550B1 (en) | 2023-10-01 |
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| CN111770805A (en) | 2020-10-13 |
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